Carbureter.



A. A. BROCK.

, l GARBURBTBR.

- l 115211011131011 FILED JULY 5, 1907. 1,011,565, Patented Dec. 12,1911.

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Li. Speeittcation o'i'etters Batent.,

io all whom may con/eem:

uisite amount oi air tosupport combustion in internal combustiony engines, and the invention has more especial reterenoeto that type of carbureters in which Athe vacuum or partial vacuum created in the carburet-er by the (irait ot the engine, as the engine approaches high speed, is compensated -t'or automatically by an auxiliary supply of air and theinixture thereby prevented trom be'- coniing too rich. -A

One of the important objects ot the invention is to provide an improved and simple torni of carbureter in which the combustible fluid will be supplied to the air in'an envel- @ping stream or column, so that the column ot air entering the carbureter will Vbe substantially inclosed by the combustible finiti.

A further object of the invention is to provide an iinprovecl and simple torni oi eenF bureter in which the auxiliary air will be supplied to the center of the column of air, and a still further Object is to provide improved and simple means whereby the-,anxiliary air inlet will be automatically/governed positively in unison with. the move# nient of the throttle. `ind the invention has' for its object finally to provide an iin.`

proved and simple form otearbureter in which the fuel supply Will be governed positively anti automatically in accord. With the position of the throttle. Y

lVith' a view to the attainment oir'these ends and the accomplishment of certain objects of minor importance hereinafter appearing, thevinvention consists in the fem tures ot novelty'whieh nonY .will be described with reference to 'the ercompanying drawings and then more fully pointed out in the claims.

ln the said drawingswliigure l is a vertical sectional view of a carbureiei' emboflving this invention. Fig. 2 is a sitle elevation thereof. Fig. 3 is a'plan view of the controlling handle or lever and its associated parts Fig. 4 is a vertical section on the transverse section et the fuel regulating' .and sprayingV nozzle. Fig. 6 is a verticali section thereof, on line 6-6 of Fig. 5. Fig. 7. is an enlarged detail plan viewvof the upper end o the auxiliary air tube. Fig. S is av sitie elevation thereof. 9 is an'enlarged rletail' section taken on line 9- of Fig. '1.

'i0 is an enlarged detail section oi the means :tor adjusting tbeelevation of the float lever pivot heiiena-'tter flew? and Fig. 1l is a detail enti-'view of such pivot.

l is a floatv chamber which maybe p'tevided' asv usual ,with any suitable inlet con` nection 2 having aregulating. valve fl. Anhicl'i in this example of the invention islieltl to. its

seat by a coil spring' et resting upon a ehonleier 5 en the valve steni, Whose opper enti 1s guided by a cap 'i' against which the up per end of the spring hears. lilit'hin the chamber l is situated en appiepni te iioet. 8 which, when the chamber empty u f n l i l line-r4 of Fig. 3; Fig. 5 1s an enlarged upon the branches of forked lever S snp-l ported; upon a pivot l@l antlhe; shorten end engaging nntier' the sint for lifting the valve niore les supply in the chamber l (leer that the level ofthe liquid in may be regulated or govern to suit tlie exigencies of the carbnretei, the elevatio the pivot l0 With relation to the shonoer may be altered, and to that enti the pivot as better shown in Figs. i0 and l, is meant-v eol eccentrieally upon the inner plain enti it? of a screw i3 Which is screw threaclefl in a socket bossist on the sicleof the noot cham* ber, so that by turning" the screw the pivotv e chamber 'i inthe bottom ofthe oat chamber l is I formed an air inlet portier passage l5 which.

is surrounded by and. communicates .with

a stanti-pipe 1.7 provided at its upper endwith a beveled edge 18, or is otherwise suitably formeel to constitute a valve seat foi cooperation with an annular valve 19 formed within sleeve 20, which is telescopefl Withthe upper enti ot' the stanttpi l?. fis better shown in Figs. 5 and (l, tie

lperiphery of the pipe i? at its upper enti liti is provided with a suitable number of channels 21 extending upwardly through the face of the valve seat 18, and the sleeve below the valve 19 is formed with a shoulder 22 which fits the periphery '.of the pipe 17 with reasonable snugness and isof suiiicient length or vertical extent to substantially opened and the gasolene or other fluid in the float chamber 1 will be entraine'd into the sleeve 20I by the current of air passmg upwardly through the stand-pipe 17, and

the valve seat 18, which is also of an annularV form, an? it will be observed that the column of a r thus entering the apparatus will be enveloped by an annular column or stream of combustible fluid issuing from between the valve seat 18 and valve 19 whose surfaces constitute continuous lips for creating a complete ring of the combustible around the air. of combustible uid thusi admitted to the air may be regulated as required, the sleeve 2() is provided with exterior adjusting means consisting preferably of a thumb nut 23 screw threaded on the upper end of a threaded stem 24, which is -secured by a spider 25 within the sleeve 2O and passes loosely through the top of the outlet neck 26, so that by rotating the thumb nut 23 the valve may be more or less opened. The valve may be lowered when the thumb nut 23 is unscrewed by a spring 27 or other suitable'means sleeved upon the stem 24, and

bearing between a shoulder 28 on the stem and the -upper side of the outlet neck 26. When the valve 19 is in its normal or working position, the lowerend of the sleeve 2O dips suiiiciently into the liquid ofthe cham'- ber 1 to cause the liquid to be elevated, even though its level be considerably below nor-v mal. The upward movement of the sleeve 20 may be limited by a shoulder 29 formed thereon in position to go into engagement with a depending portion 30 of the outlet neck 26 which is telescoped with the sleeve 20 and forms a substantially air-tight connection between the sleeve and said outlet neck, but it is, of course, desirable, nevertheless, that the lower end of the extension 30 be above the normal level of the liquid in the float chamberV 1, so as` to avoid any possibility of the liquid being entrained into the neck 2 6 of the carbureterthrough this joint. The outlet neck. 26and the down- In order-f that the quantity ward extension 30 thereof are formed upon a cap or cover 31-secured to the oatchamber M1 by screws 32 or other suitable means whereby the float may be removed when this cap or cover` is detached, and it is apparent thatin assembling the elements the neck 20 and its connected parts will bev carried by the cap 31 and introduced over the stand-pipe 17 after the fioat 20, which is of annular form, hasbeen placed in the chamber 1 around'said stand-pipe.

The amount of air passing the valve seat `18 may be regulated as desired by a throttle 33 supported within thestand-pipe 17 by means of a downward extension 34 on the lower end'of stem 24, s'o that the throttle will be adjusted in unison lwith the fuel valve 19, these two valves being so fixed with relation to their respective seats as to maintain the proper proportion of v air and fuel. The seat for the throttle 33 is formed by an internal or annular enlargement 35 within the pipe 17 at its upper end, although it is, of course, understood that in practice it may never be necessary to bring the throttle 33 into actual contact with its seat. The portion carrying the throttle 33 is preferably in the form of a tube 36 so that it may be utilized as a passage for the auxiliary air to the interior of the column of air and fuel.

thereby be converted into a thin annular sheet or column highly rarelied and of great v elocity by reason of this reduction in the size of the passage. This serves to eyrain the gasolene or other fuel from the chamber 1, causing it to rise in the space between the stand-pipe 17 and sleeve 20 and through the channels 21, whence it impingesthe outwardly inclining annular valve 19 and is converted into an annular column surroundlio ing the annular column of air emerging from the space betweenthe throttle 33 and scat 35. The auxiliary air. which is admitted through the tube 36 into the center of this annular column of air and fuel is broken up 'into a number of streams by means of a spider or plurality of spokes 37 radiating from the extension 34'to the walls of, the tube 36, and the column of air and fuel sur' b etween these streams of auxiliary air by. r side passages 38 formed in the upper end of `the tube 36 at points between some ofthe spokes 37 as shown in Figs. 7 and 8, thus causing a more intimate association of the and fuelcreated. The lower end of the auxiling between the valve 19 and its seat 1S, and 10o rounding the tube 36 is partially admitted' 120 nommer.

lary air tuloe 36 isinserted in a cup 3S and is provided in its side Awith an inlet port d0, and one side of the cup is provided witha valve el' which is oi'- semi-cylindrical form ttiug partially around the tube 36, so that when the tube is in a certain position, the inlet port lyyvill he closed er1-maybe more or less open, according to the position or" the regulating lever or handle ot' the carhureter.

During the operation of 'the carburetor the valve el is stationary', While the tube 36 moves, out the position of the Valve el may, if desired, he altered with relation to the position of the port 4 0 by rotating the valvel To that vend the il upon its vertical airis. cup 39 is semiredk to a set screw l2 which is preferably journaled in the lower side ot mouth-piece 43 and provided with a set nut 4A capable of clamping the cup in position, therset screw. being also provided with a turning handle 45 vwhereby the valve lll may he positioned when the nut Llll'is released. It Will thus be seen that when it is not desired to have any auxiliary air, the lower end 'ot the auxiliary air tube 36 will he`` .completely closed by the cup 39 and the perle() Willlbe closed by the valve 41, but

should the degree of vacuum in the outletneck 26 of thecarbureter require additional air over 'and above that which may be admitted around the throttle 33, the result may he accomplished by rotary movement of the tube 36, and this being secured permanently to the valvestem 24, ,it of course followsv that the auxiliary air will be admitted automatically when said-valve stem is rotated to'admit a larger proportion o' fuel. rlhis opening and closing action of t 1e fuel valve 19 and throttle 33 resulting from the rotation of the stem 24 may be caused by any suitable device having proper operative rei lation to said stem and preferably by means of a cam i6 threaded upon the upper end of the stem 24e and formed on or secured to the the outlet neck 26, so that when the lever or handle alla is oscllated in one direction,

the cooperating cam faces 46, 47 Will ,litt the stem 24 by engagement' With the adjusting nut 23 and when moved in the other direction will permit the stem to be lowered by the spring 27.

Li8 is a'throttle pivoted on the shaft 49 in horizontal extension 5.0 to the outlet neck, and in order that the rising and falling movement of the fuel valve 19 and air throttle 33 may result in a corresponding adjust-v ment of the throttle a8, the shaft 49 is provided with'a pinion 51 engaging with a segment 52 on thev edge of the cam 46. The outlet neck of the carburetor ocourse leads Vto the engine or other device Which is to be supplied With the, combustible mixture, and inbut when given a half-turn to the position Ashown in dotted lines, constitutes a horizontal continuation of the extension 50.

ln order that the invention may he underr stood by those skilled in Athe art,-the details of an. exemplitication 'thereof have heen thus speciiically described, but

lNhatl claim as new and desire to secure by Lett-ers Patent is Vl. In a carbureter the combination of aA air, means for regulating said column et air in unison with the movement of the throttle, means-for creating awholloW stream i eratively connected Withv the Ythrottle for ad- 'mitting auxiliary air.v

2. ln acarbureter the combination of achamberfor iluid. fuel, an annular valve seat, an annular valve arranged to coperate with said seatsaid'seatI and valve being so disposed with relation to said chamber as to admit the fluid from the chamber vbetween them to control the supply of Huid, and means,l for directing a current of air through said annular valve seat. y 3. ln a carbureter the combination of a fuel chamber, a standajipe Vtherein communicating with the at1nospherc-and provided at its inner end with an annular valve seat, a sleeve telescoped with said stand-pipe and having anaunular valve coporating With said seat, and means for adjusting said sleeve and thereby regulating the .opening between said valve and seat.

4. ln a carbureter Vthe combination of a fuel chamber, astand-pipe rising therein and communicating with the atmosphere and having an annular valve seat at its inner end,ka sleeve telesooped with'said stand-pipe and having an annular valve coperating with saidl valve seat, an outlet passage for the'carburetcr With which said sleeve has telescopic communication, and means for adjusting said sleeve with relation to said pipe.

5. In acarbureter thc'combination of a fuel chamber, a stand-pipe rising therein and having communication with the atmosphere and provided at its inner ond with an annular valve seat, a'sleeve telescoped with said standpipe and having an annular valve cooperatingwith said seat, means for adjusting said sleeve 'with relation to said pipe,

Aa throttle situated Within said annular valvev vand .communicating with the atmosphere amount of air passing through saidpipe seat for controlling `the passage of air through said valve seat, and means for adjusting said throttle.

6. In a carbureter the combination of a fuel chamber, a stand-pipe rising therein and provided at its inner end with an annular valve seat, a sleeve telescoped with said pipe and having an annular valve cooperating with' said seat, a throttle within said annular seat for regulating the passage of air vtherethrough, and means for adjusting said valve and throttle simultaneously.

7. In a carbureter the combination of a fuel chamber, a stand-pipe therein communicating with the atmosphere and having an annular valve seat at its inner end, a sleeve-telescoped with said pipe and having an annular valve coperating with said seat, an auxiliary air inlet tube arranged within said'pipe, a throttle on the inner end of said tube situated wit-hin said annular valve seat for controlling the passage of air throu h said pipe, a port in the side of the tube for admitting air thereto, means arranged to cover said port and means whereby said tube may be moved longitudinally to vary the and move rotatively to vary the amount of air admitted through said port.

8. In a carbureter the combination of a fuel chamber, a stand-pipe therein communicating with the atmosphere, and having an annular valve seat at its inner end, a sleeve telescoped with said pipe and having an annular valve coperating with said seat, an auxiliary air tube arranged within said pipe and having a throttle situated Within said annularvalve seat, means for admitting air'to said tube when the tube is rotated and means for simultaneously rotatingand reciprocating said tube and also reciprocating said sleeve.

9. In a carbureter the combination of a fuel lchamber, a standpipe therein communioating with the atmosphere andhaving an annular valve seat at its inner end, a

throttle situated within said pipe for controlling the amount of air passing therethrough, an auxiliary air inlet tube conl 'nected with said throttle and having an air inlet port in its side, a cup receiving the lower end of said tube', a valve on said cup partially surrounding said tube for regulating said port, means for rotatively adjusting said cup and last said valve, a sleeve teleseoped with said pipe and having an annular valve coperating with said seat, and means for rotating and reciprocating said tube.

l0. In a= carbureter the combination of an annular fuel regulating valve, an annular valve seat therefor having communication with the external atmosphere, an auxiliary air inlet tube having communication with the atmosphere at its outer end and pro- 4vided at its inner end with a throttle for regulating the air passing through said annular valve seat, a valve for controlling the auxiliary air entering said tube, conformingr to the cylindrical exterior of the tube and rotatable on the axis of the tube, means for thus rotating the last said valve and locking it in position with relation to the tube, and means vfor rotating the tube to regulate the amount of auxiliary air admitted thereto.

, 11. In a carbureter, the combinatibn of a fuel chamber, a stand pipe communicating therewith and provided with an annular valve seat, an annular valve coperating with the seat, means for supplying a fluid fuel between the valve and its seatto form a complete annular stream of fuel Within the stand pipe and against the wall thereof,

means for creating a column of air within the annular column of fuel and for directing the air against the wall of the stand pipe to remove the fuel therefrom and combine therewith, and means for adjusting the valve with relation torits seat to vary the supply of fuel.

, In testimony whereof lI have signed my l name to this specification, in the presence of two subscribiig witnesses, on -this 1st day of July A. D. 19

p ANREW A. BROCK. Witnesses: i

FRANCIS A HOPKINS, J. H. JOCHUM, Jr. 

